Three-dimensional measuring arm with positioning function

Abstract

The utility model discloses a three-dimensional measuring arm with a positioning function, which relates to the technical field of measuring arms and comprises an equipment platform, a three-dimensional measuring unit, a spacing adjusting unit and a positioning and clamping unit. The equipment platform is a rectangular flat plate; the three-dimensional measuring unit comprises a circular ring, an inner ring, a laser measuring instrument, a gear ring, a measuring auxiliary motor and a driving gear, the inner side of the circular ring is rotatably connected with the inner ring, the laser measuring instrument is installed on the inner side of the inner ring, the front end of the inner ring is fixedly connected with the gear ring, and the bottom end of the gear ring is in meshed connection with the driving gear; the middle part of the rear side surface of the driving gear is fixedly connected with an output shaft of a measurement auxiliary motor, and the interval-adjustable clamping device is adopted, so that not only is the clamping and positioning of a measured workpiece realized, but also workpieces with different lengths can be clamped; and meanwhile, the linear motor capable of longitudinally moving is adopted to drive the annular measuring device, so that the three-dimensional accurate measurement work of the workpiece is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of precision parts measurement, in particular to a three-dimensional measuring arm with a positioning function. Background Art

[0002] With the development of science and technology, people's living standards are constantly improving, and cars are increasingly used in people's lives. Among them, the crankshaft is an indispensable part of the car. Due to the working characteristics of the crankshaft, the size of the qualified crankshaft needs to be accurate to the micron level. Therefore, after the crankshaft is processed, it is necessary to judge whether the crankshaft on the production line meets the production standards. The crankshafts with qualified sizes will enter the next process, and the crankshafts with unqualified sizes will be scrapped.

[0003] Among them, the current technology with the authorization announcement number CN114964086A proposes a three-dimensional measuring arm with a positioning function, including a support table, mounting mechanisms are arranged on both sides of the support table, a supporting mechanism is arranged in the middle of the support table, the top of the mounting mechanism and the top of the supporting mechanism are fixedly connected to the measuring arm body, the measuring arm body is arranged on the top of the support table, and the left side of the measuring arm body is fixedly connected to the positioning mechanism. The three-dimensional measuring arm with a positioning function can start the motor, and the motor drives the first threaded rod to rotate while driving the second sliding block and the first sliding block to move in a direction close to each other. Under the support of the first support rod, it can drive the two grippers to move in a direction close to each other.

[0004] However, this solution cannot stably fix longer workpieces, such as crankshafts, camshafts, etc., and therefore cannot measure such workpieces. To this end, we propose a three-dimensional measuring arm with positioning function. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a three-dimensional measuring arm with a positioning function. The clamping device with adjustable spacing not only realizes the clamping and positioning of the measured workpiece, but also can clamp workpieces of different lengths. At the same time, a longitudinally movable linear motor is used to drive the annular measuring device to realize the three-dimensional precise measurement of the workpiece, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-dimensional measuring arm with positioning function, comprising an equipment platform, a three-dimensional measuring unit, a spacing adjustment unit and a positioning clamping unit;

[0007] Equipment platform: rectangular flat plate;

[0008] Three-dimensional measurement unit: comprising a circular ring, an inner ring, a laser measuring instrument, a gear ring, a measuring auxiliary motor and a driving gear. The inner side of the circular ring is rotatably connected to the inner ring, the inner side of the inner ring is equipped with a laser measuring instrument, the front end of the inner ring is fixedly connected to the gear ring, the bottom end of the gear ring is meshed and connected to the driving gear, the middle part of the rear side surface of the driving gear is fixedly connected to the output shaft of the measuring auxiliary motor, the top of the measuring auxiliary motor is fixedly connected to the circular ring, and the input ends of the measuring auxiliary motor and the laser measuring instrument are electrically connected to the external power supply through an external control switch group;

[0009] Spacing adjustment units: two spacing adjustment units are provided, and the spacing adjustment units are respectively installed on the front and rear sides of the upper surface of the equipment platform;

[0010] Positioning clamping unit: installed on two spacing adjustment units.

[0011] The circular ring is used to rotate and connect the inner ring, and the inner ring is used to install the laser measuring instrument. The rotational power provided by the measurement auxiliary motor drives the gear ring to rotate through the active gear. The gear ring is connected to the inner ring, so that the laser measuring instrument rotates around the crankshaft to measure the specific size of the crankshaft.

[0012] Furthermore, the three-dimensional measurement unit also includes a linear motor, a linear track and a vertical plate. The top of the ring is fixedly connected to the linear motor, and the linear motor is cooperatively connected to the linear track. The two ends of the linear track are respectively fixedly connected to the top of the vertical plate, and the bottom end of the vertical plate is respectively fixedly connected to the middle of the two ends of the equipment platform. The input end of the linear motor is electrically connected to the external power supply through an external control switch group.

[0013] The vertical plate is used to elevate and fix the linear track, which provides a motion track for the linear motor. The linear motor drives the horizontal movement of the ring to facilitate measurement in the longitudinal direction.

[0014] Furthermore, the spacing adjustment unit includes an electric telescopic rod, a slider and a slide bar. The rear sides of the upper surface wall of the equipment platform are fixedly connected to longitudinal slide bars, and the slide bars are slidably connected to the sliders. The sides of the two sliders that are away from each other are fixedly connected to the telescopic ends of the electric telescopic rod. The fixed ends of the electric telescopic rod are fixedly connected to the corresponding vertical plates, and the input end of the electric telescopic rod is electrically connected to the external power supply through an external control switch group.

[0015] The slide bar provides a stable sliding direction for the slider, the slider is used to connect the positioning clamping unit, and the electric telescopic rod controls the spacing of the slider through its own telescopic movement, so as to clamp crankshafts of different lengths.

[0016] Furthermore, the positioning clamping unit includes a threaded rod and a threaded sleeve, the upper surface of the slider is rotatably connected to the threaded rod, the threaded rods on the same side of the front and rear are threadedly connected to two threaded sleeves, and the two threaded sleeves on the same side of the front and rear have opposite threads and are threadedly connected to the corresponding threaded rods.

[0017] Each threaded rod is threadedly connected to two threaded sleeves. Since the threaded sleeves on the same side use opposite threads, the rotation of the threaded rod can drive the two threaded sleeves on the same side to move equidistantly closer to or away from each other to achieve a clamping action.

[0018] Furthermore, the positioning and clamping unit also includes a sliding connecting plate, a sliding column and a threaded rod motor, the threaded sleeves on the same front and rear sides are fixedly connected to the sliding connecting plates on one side close to the ring, the sliding connecting plates on the same front and rear sides are slidably connected to the sliding columns, the sliding columns are fixedly connected to the corresponding sliders, the top ends of the threaded rods are fixedly connected to the output shafts of the threaded rod motors, the threaded rod motors are fixedly connected to the top ends of the sliding columns, and the input ends of the threaded rod motors are electrically connected to the external power supply through an external control switch group.

[0019] The mutual sliding of the sliding connecting plate and the sliding column prevents the sliding connecting plate from generating additional rotation. At the same time, since the sliding connecting plate adopts a longer design, before clamping, the linear motor can be controlled to move to one side to expose the space between the two sets of arc-shaped clamping plates without obstruction, so as to facilitate the placement of the crankshaft. The threaded rod motor provides rotational power to drive the threaded rod to rotate.

[0020] Furthermore, the positioning and clamping unit also includes an arc-shaped clamping plate and a crankshaft, and one end of the sliding connecting plate close to the circular ring is fixedly connected to the arc-shaped clamping plate, and the arc-shaped clamping plates on the same side clamp the two ends of the crankshaft respectively.

[0021] The curved clamping plate provides direct clamping of the crankshaft.

[0022] Compared with the prior art, the beneficial effects of the utility model are: the three-dimensional measuring arm with positioning function has the following advantages:

[0023] 1. This three-dimensional measuring arm with positioning function has a rotating laser measuring instrument installed in the ring to complete the measurement of the parameters of the crankshaft and other workpieces in the circumferential direction. At the same time, a linear motor is used to control the longitudinal movement of the ring to control the measurement in the longitudinal direction.

[0024] 2. The three-dimensional measuring arm with positioning function has a rotating threaded rod that is threadedly connected to two opposite threaded sleeves, so that the two threaded sleeves can move closer to or farther from each other, thereby clamping workpieces such as crankshafts and achieving self-locking of the clamping.

[0025] 3. This three-dimensional measuring arm with positioning function has two clamping devices that are controlled separately by two independently controlled electric telescopic rods, which realizes the adjustment of the spacing between the clamping devices, can clamp workpieces of different lengths, and form a stable clamping state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 For this utility model Figure 1 A schematic diagram of the partially enlarged structure at center A;

[0028] Figure 3 For this utility model Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0029] In the figure: 1 equipment platform, 2 three-dimensional measuring unit, 21 circular ring, 22 inner ring, 23 laser measuring instrument, 24 gear ring, 25 measuring auxiliary motor, 26 driving gear, 27 linear motor, 28 linear track, 29 vertical plate, 3 spacing adjustment unit, 31 electric telescopic rod, 32 slider, 33 slide bar, 4 positioning clamping unit, 41 threaded rod, 42 threaded sleeve, 43 sliding connecting plate, 44 sliding column, 45 threaded rod motor, 46 arc splint, 47 crankshaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-3 ,This embodiment provides a technical solution: a three-dimensional measuring arm with a positioning function, comprising an equipment platform 1, a three-dimensional measuring unit 2, a spacing adjustment unit 3 and a positioning clamping unit 4;

[0032] Equipment platform 1: a rectangular flat plate;

[0033] The three-dimensional measuring unit 2 comprises a circular ring 21, an inner ring 22, a laser measuring instrument 23, a gear ring 24, a measuring auxiliary motor 25 and a driving gear 26. The inner side of the circular ring 21 is rotatably connected to the inner ring 22. The laser measuring instrument 23 is installed on the inner side of the inner ring 22. The front end of the inner ring 22 is fixedly connected to the gear ring 24. The bottom end of the gear ring 24 is meshedly connected to the driving gear 26. The middle part of the rear side surface of the driving gear 26 is fixedly connected to the output shaft of the measuring auxiliary motor 25. The top of the measuring auxiliary motor 25 is fixedly connected to the circular ring 21. The input ends of the measuring auxiliary motor 25 and the laser measuring instrument 23 are electrically connected to the external power supply through an external control switch group.

[0034] Spacing adjustment units 3: two spacing adjustment units 3 are provided, and the spacing adjustment units 3 are respectively installed on the front and rear sides of the upper surface of the equipment platform 1;

[0035] The spacing adjustment unit 3 includes an electric telescopic rod 31, a slider 32 and a slide bar 33. The rear side of the upper surface wall of the equipment platform 1 is fixedly connected to the longitudinal slide bar 33, and the slide bar 33 is slidably connected to the slider 32. The sides of the two sliders 32 that are away from each other are fixedly connected to the telescopic ends of the electric telescopic rod 31, and the fixed ends of the electric telescopic rod 31 are fixedly connected to the corresponding vertical plates 29. The input end of the electric telescopic rod 31 is electrically connected to the external power supply through an external control switch group.

[0036] The slide bar 33 provides a stable sliding direction for the slider 32 . The slider 32 is used to connect the positioning clamping unit 4 . The electric telescopic rod 31 controls the spacing of the slider 32 by its own telescopic movement, and can clamp the crankshafts 47 of different lengths.

[0037] Positioning clamping unit 4: installed on the two spacing adjustment units 3.

[0038] The positioning clamping unit 4 includes a threaded rod 41 and a threaded sleeve 42. The upper surface of the slider 32 is rotatably connected to the threaded rod 41. The threaded rods 41 on the same side of the front and rear are respectively threadedly connected to two threaded sleeves 42. The two threaded sleeves 42 on the same side of the front and rear have opposite threads and are threadedly connected to the corresponding threaded rods 41.

[0039] Each threaded rod 41 is threadedly connected to two threaded sleeves 42 . Since the threaded sleeves 42 on the same side adopt opposite threads, the rotation of the threaded rod 41 can drive the two threaded sleeves 42 on the same side to move equidistantly closer to or away from each other to achieve a clamping action.

[0040] The positioning clamping unit 4 also includes a sliding connecting plate 43, a sliding column 44 and a threaded rod motor 45. The threaded sleeves 42 on the same side of the front and rear are fixedly connected to the sliding connecting plate 43 on one side close to the ring 21. The sliding connecting plates 43 on the same side of the front and rear are slidingly connected to the sliding columns 44. The sliding columns 44 are fixedly connected to the corresponding sliders 32. The top ends of the threaded rods 41 are fixedly connected to the output shafts of the threaded rod motors 45. The threaded rod motors 45 are fixedly connected to the top ends of the sliding columns 44. The input ends of the threaded rod motors 45 are electrically connected to the external power supply through an external control switch group.

[0041] The mutual sliding of the sliding connecting plate 43 and the sliding column 44 prevents the sliding connecting plate 43 from generating additional rotation. At the same time, since the sliding connecting plate 43 adopts a longer design, before clamping, it is possible to control the linear motor 27 to move to one side, exposing the two sets of arc-shaped clamping plates 46 without obstruction, so as to facilitate the placement of the crankshaft 47. The threaded rod motor 45 provides rotational power to drive the threaded rod 41 to rotate.

[0042] The positioning clamping unit 4 further includes an arc-shaped clamping plate 46 and a crankshaft 47 . One end of the sliding connecting plate 43 close to the ring 21 is fixedly connected to the arc-shaped clamping plate 46 , and the arc-shaped clamping plates 46 on the same side clamp the two ends of the crankshaft 47 .

[0043] The arc-shaped clamping plate 46 directly clamps the crankshaft 47 .

[0044] The circular ring 21 is used to rotate and connect the inner ring 22, and the inner ring 22 is used to install the laser measuring instrument 23. The rotational power provided by the measurement auxiliary motor 25 drives the gear ring 24 to rotate through the driving gear 26. The gear ring 24 is connected to the inner ring 22, so that the laser measuring instrument 23 rotates around the crankshaft 47 to measure the specific size of the crankshaft 47.

[0045] The three-dimensional measurement unit 2 also includes a linear motor 27, a linear track 28 and a vertical plate 29. The top of the ring 21 is fixedly connected to the linear motor 27, and the linear motor 27 is connected to the linear track 28. The two ends of the linear track 28 are respectively fixedly connected to the top of the vertical plate 29, and the bottom ends of the vertical plate 29 are respectively fixedly connected to the middle of the two ends of the equipment platform 1. The input end of the linear motor 27 is electrically connected to the external power supply through an external control switch group.

[0046] The vertical plate 29 is used to elevate and fix the linear track 28. The linear track 28 provides a motion track for the linear motor 27. The linear motor 27 drives the horizontal movement of the ring 21 to facilitate the measurement in the longitudinal direction.

[0047] The working principle of a three-dimensional measuring arm with positioning function provided by the utility model is as follows:

[0048] The circular ring 21 is used to rotate and connect the inner ring 22. The inner ring 22 is used to install the laser measuring instrument 23. The rotational power provided by the measuring auxiliary motor 25 drives the gear ring 24 to rotate through the driving gear 26. The gear ring 24 is connected to the inner ring 22, so that the laser measuring instrument 23 rotates around the crankshaft 47 to measure the specific size of the crankshaft 47. The vertical plate 29 is used to raise and fix the linear track 28. The linear track 28 provides a motion track for the linear motor 27. The linear motor 27 drives the horizontal movement of the circular ring 21 to facilitate the measurement in the longitudinal direction.

[0049] The slide bar 33 provides a stable sliding direction for the slider 32 . The slider 32 is used to connect the positioning clamping unit 4 . The electric telescopic rod 31 controls the spacing of the slider 32 by its own telescopic movement, and can clamp the crankshafts 47 of different lengths.

[0050] Each threaded rod 41 is threadedly connected to two threaded sleeves 42. Since the threaded sleeves 42 on the same side adopt opposite threads, the rotation of the threaded rod 41 can drive the two threaded sleeves 42 on the same side to move equidistantly closer to or away from each other to achieve the clamping action. The sliding connection plate 43 and the sliding column 44 slide against each other to prevent the sliding connection plate 43 from generating additional rotation. At the same time, since the sliding connection plate 43 adopts a longer design, before clamping, it is possible to control the linear motor 27 to move to one side, so that the space between the two sets of arc clamping plates 46 is exposed without obstruction, so as to facilitate the placement of the crankshaft 47. The threaded rod motor 45 provides rotational power to drive the threaded rod 41 to rotate. The arc clamping plate 46 completes the direct clamping of the crankshaft 47.

[0051] It is worth noting that the measurement auxiliary motor 25 and threaded rod motor 45 disclosed in the above embodiments should adopt servo motors, and the external control switch group measurement auxiliary motor 25, laser measuring instrument 23, linear motor 27, electric telescopic rod 31 and threaded rod motor 45 work using methods commonly used in the prior art.

[0052] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A three-dimensional measuring arm with positioning function, characterized in that: It comprises an equipment platform (1), a three-dimensional measurement unit (2), a spacing adjustment unit (3) and a positioning clamping unit (4); Equipment platform (1): a rectangular flat plate; The three-dimensional measurement unit (2) comprises a circular ring (21), an inner ring (22), a laser measuring instrument (23), a gear ring (24), a measuring auxiliary motor (25) and a driving gear (26); the inner side of the circular ring (21) is rotatably connected to the inner ring (22); the inner side of the inner ring (22) is equipped with a laser measuring instrument (23); the front end of the inner ring (22) is fixedly connected to the gear ring (24); the bottom end of the gear ring (24) is meshedly connected to the driving gear (26); the middle part of the rear side surface of the driving gear (26) is fixedly connected to the output shaft of the measuring auxiliary motor (25); the top of the measuring auxiliary motor (25) is fixedly connected to the circular ring (21); the input ends of the measuring auxiliary motor (25) and the laser measuring instrument (23) are electrically connected to an external power supply through an external control switch group; Spacing adjustment units (3): two spacing adjustment units (3) are provided, and the spacing adjustment units (3) are respectively installed on the front and rear sides of the upper surface of the equipment platform (1); Positioning clamping unit (4): installed on the two spacing adjustment units (3).

2. The three-dimensional measuring arm with positioning function according to claim 1, characterized in that: The three-dimensional measurement unit (2) further comprises a linear motor (27), a linear track (28) and a vertical plate (29); the top of the circular ring (21) is fixedly connected to the linear motor (27); the linear motor (27) is cooperatively connected to the linear track (28); the two ends of the linear track (28) are respectively fixedly connected to the top of the vertical plate (29); the bottom end of the vertical plate (29) is respectively fixedly connected to the middle of the two ends of the equipment platform (1); and the input end of the linear motor (27) is electrically connected to an external power supply through an external control switch group.

3. The three-dimensional measuring arm with positioning function according to claim 2, characterized in that: The spacing adjustment unit (3) comprises an electric telescopic rod (31), a slider (32) and a slide bar (33); the rear side of the upper surface wall of the equipment platform (1) is respectively fixedly connected to the longitudinal slide bar (33); the slide bar (33) is respectively slidably connected to the slider (32); the sides of the two sliders (32) that are away from each other are respectively fixedly connected to the telescopic end of the electric telescopic rod (31); the fixed end of the electric telescopic rod (31) is respectively fixedly connected to the corresponding vertical plate (29); and the input end of the electric telescopic rod (31) is electrically connected to an external power supply through an external control switch group.

4. The three-dimensional measuring arm with positioning function according to claim 3, characterized in that: The positioning clamping unit (4) comprises a threaded rod (41) and a threaded sleeve (42); the upper surface of the slider (32) is rotatably connected to the threaded rod (41); the threaded rods (41) on the same side of the front and rear are respectively threadedly connected to two threaded sleeves (42); the two threaded sleeves (42) on the same side of the front and rear are respectively threaded in opposite directions and are threadedly connected to the corresponding threaded rods (41).

5. The three-dimensional measuring arm with positioning function according to claim 4, characterized in that: The positioning clamping unit (4) further comprises a sliding connection plate (43), a sliding column (44) and a threaded rod motor (45); the threaded sleeves (42) on the same side of the front and rear sides are respectively fixedly connected to the sliding connection plate (43) on the side close to the ring (21); the sliding connection plates (43) on the same side of the front and rear sides are respectively slidably connected to the sliding columns (44); the sliding columns (44) are respectively fixedly connected to the corresponding sliders (32); the top ends of the threaded rods (41) are respectively fixedly connected to the output shafts of the threaded rod motors (45); the threaded rod motors (45) are respectively fixedly connected to the top ends of the sliding columns (44); and the input ends of the threaded rod motors (45) are electrically connected to an external power supply via an external control switch group.

6. The three-dimensional measuring arm with positioning function according to claim 5, characterized in that: The positioning clamping unit (4) further comprises an arc-shaped clamping plate (46) and a crankshaft (47); one end of the sliding connection plate (43) close to the circular ring (21) is fixedly connected to the arc-shaped clamping plate (46); and the arc-shaped clamping plates (46) on the same side clamp the two ends of the crankshaft (47) respectively.

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